Danfoss VLT 2800 Series General Information

Special functions
400 Brake function
(Brake function)
Value:
Off (off) [0]
Resistor brake
(Resistor) [1]
AC brake (AC Brake) [4]
Load sharing (load sharing) [5]
Factory setting depends on unit type.
Function:
Resistor brake [1] is selected if the adjustable frequen-
cy drive has an integral brake transistor and brake
resistor is connected to terminals 81, 82. A higher in-
termediate circuit voltage is permitted during braking
(generated operation) when a brake resistor is con-
nected.
AC brake [4] can be selected to improve braking with-
out using brake resistors. Please note that AC brake
[4] is not as effective as Resistor brake [1].
Description of choice:
Select Resistor brake [1] if a brake resistor is connec-
ted.
Select AC brake [4] if short-term generated loads oc-
cur. See parameter 144 Gain AC brake to set the brake.
Select Load sharing [5] if this is used.
NOTE
A change of selection will not become ac-
tive until the mains voltage has been dis-
connected and reconnected.
405 Reset function
(reset mode)
Value:
Manual reset (manual reset) [0]
Automatic reset x 1
(AUTOMATIC x 1) [1]
Automatic reset x 3
(AUTOMATIC x 3) [3]
Automatic reset x 10 [10]
(AUTOMATIC x 10)
Reset at power-up
(RESET AT POWER UP) [11]
Function:
This parameter makes it possible to select whether re-
set and restart after a trip are to be manual or whether
the adjustable frequency drive is to be reset and re-
started automatically. Furthermore, it is possible to
select the number of times a restart is to be attempted.
The time between each attempt is set in parameter 406
Automatic restart time.
Description of choice:
If Manual reset [0] is selected, reset is to be carried out
via the [STOP/RESET] key, a digital input or serial
communication. If the adjustable frequency drive is to
carry out an automatic reset and restart after a trip,
select data value [1], [3] or [10].
If Reset at power-up [11] is selected, the adjustable
frequency drive will carry out a reset if there has been
a fault in connection with the mains failure.
The motor may start without warning.
406 Automatic restart time
(autorestart time)
Value:
0 - 10 sec.
5 sec.
Function:
This parameter allows setting of the time from tripping
until the automatic reset function begins. It is assumed
that automatic reset has been selected in parameter
405 Reset function.
Description of choice:
Set the required time.
409
Trip delay overcurrent, I
LIM
(trip delay cur.)
Value:
0 - 60 sec. (61=OFF)
OFF
VLT
®
2800 Series
= factory setting, () = display text, [] = value for use in communication via serial communication port
MG.27.A2.22 - VLT
®
is a registered Danfoss trademark 69
Programming

Danfoss VLT 2800 Series Specifications

General

Brand	Danfoss
Model	VLT 2800 Series
Category	DC Drives
Language	English